Puncture-proof tire-insert



R. B. msRRow'.`

PUNCTURE PRooF TIRE INSERT.

APPLICATION FILED OCT. 3|, 1918.

` 1,384,243. 1 Patented my 12, 1921.

yliner made oi' rubber or a UNITED STATES nnUBnN B. nTsBRoW, or s'r. ,:PAUn MINNESOTA.

PATENT OFFICE.

PUNCTURE-.PROQF TIRE-SINSERT.

Application filed October 31, 1918.@Seral No. 260,463.

Y 0 all fwltomct may concern: y

lle it known that I, RnUEN B. Disnnow, a citizen of the United States, residing at St. Paul, in the county oft Ramsey and State of Minnesota, havefinvented certain new and useful Improvements in Puncture- Proof Tire-Inserts; and I do `hereby declare the following to be a full, clear, and exact description of the invention, such as willV en able others skilled in the art to which it appertains to malte and use the same.

My invention has for its object to provide an extremely simple and highly eiiicient puncture proof casing liner tor pneumatic tires; and to such ends, generally stated, the invention consists of the novel construction and combination oit parts hereinafter described and dened in the claim.

In accordance with my invention, lf vprovide for the casing of an ordinary pneumatic tire, a separately formed insertible combination of rubber and fabric so that it has the desired flexibility, and inserted in the said liner is a metallic armor made up of sections that are articulated' or connected in such manner that they do not destroy the resilience of the tire. This liner has such flexibility that it may be bent for inserting into or removal from the casing. lt decreases slightly the inner diameter of the casing, and hence itis advisable to use within the casing a somewhat smaller inner tube than would be employed with the liner removed, but, nevertheless, the larger or oversize inner tube may be employed with the liner inserted.

Preferably, the sections of the liner are made of thin spring tempered sheet steel stamped into slightly cancaro convex form. The ends of these sections are of peculiar and novel 'formation and are overlapped and ilexibly Vconnected in such manner that when the liner is in position within the casing, nails, or the like cannot, under any ordinary circumstances, pass through the casing into the inner tube. l f

The invention is illust 'ated in the accompanying drawings wherein like characters indicate like parts throughout the several views. Referring to the drawings;

Figure l is a side elevation showing a tire casing having my improved liner applied therein, some parts being sectioned;

Fig. 2 is an enlarged section taken through the tire and liner on the line 2 2 of Fig. l; Fig. 3 is a plan view showing two sections of theyarmor of the liner removed from the.`

liner; p l y y f Fig. 4 is a section taken approximately `on the line 4 4 of Fig. '3; and

Fig. 5 is a transverse section through one of the armor sections but illustrating a hat form thereof. i The tire casing, which may be of the usual or any suitable construction, is indicated,v as an entirety, by the numeral 6. The body ol2 the so-called liner is indicated by the character a.. This body, as indicated, is very flexible. Preferably, it will be made ot soit rubber but may be reinforced with canvas, or, in other words it may be made a goed deal on the plan of a tire casing, although it is advisably made more pliable and of a rubber of more spongy character, and this, for two reasons, to wit, that the liner may be easily inserted within the casing and removed therefroin, and when applied in the casing, will increase the resilience thereof,

Embedded within this `liner a, preferably beingV ycast therein in theprocess ot forming said liner, is the puncture prooi tire armor niade'up of a plurality o1c circumterentially extended sheet steel sections f7 having ovverlapped edges. The overlapped edges ot these armor sections 7 are preferably constructed substantially as follows i At one end, each section is formed with at least two slits Sthat form a hinged tongue between them; and at its other edge, said section is formed with a plurality of slits l0 and l1, a central hinged tongue l2 being formed between the slits l0. Then the two Vsections are put together, as shown in Figs.

be overlapped by the wide tongues that are i formed outward oi' the tongue 9 on theadjacent section. This gives a lap joint loe-A tween the sections and atthe same time, gives a `decided flexibility to the endless, or complete armor, and moreover, the interlockn ing engagement described will hold the sections of the armor against lateral movements or displacement. n

Preferably, the'sections of the armor are made concave convex in cross section, as best shown in Fig. 2, but the sections may be fiat, as shown in Fig. 5. The armor or punctureproofinsert described'may be applied Within a tire casing in the process of making the same, at comparatively small cost and-:Will obviate nearly or all of the annoyance covered by punctures.

l sections or-'have Split ends, but such con-V struction would `not be as good as the end- Preferably, the casing liner, so-called, is an `endless annular band that is l crescent shaped in cross section. It might be made in less structure, because it Would not give as good a surface for contact with the inner tube of the tire'. Y

' Vhat I claim is:.

A casing liner for pneumatic tires having site side of the adjacent section from the` portions at the sides of saidtongue.

In testimony whereof I aix my signature in presence ot'two Witnesses.

REUBEN B. DIsBRoW.

Witnesses CLARA DEMAREST, F. D. MERCHANT. 

